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Nuclear Theory

Title:
How does the charged-lepton's mass affect the quasielastic neutrino cross sections?

Abstract: Martini et al. [Phys. Rev. C 94, 015501 (2016)] have recently observed that
when the produced-lepton's mass plays an important role, the charged-current
quasielastic cross section for muon neutrinos can be higher than that for
electron neutrinos. Here we argue that this effect appears solely in the
theoretical descriptions of nuclear effects in which nucleon knockout requires
the energy and momentum transfers to lie in a narrow range of the kinematically
allowed values.